package com.ithiema.reggie.filter;


import com.alibaba.fastjson.JSON;
import com.ithiema.reggie.common.ApplicationContext;
import com.ithiema.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
@Slf4j
@WebFilter(urlPatterns = "/*")
public class LoginFilter implements Filter {
    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        //1、获取本次请求的URI
        String requestURI = request.getRequestURI();// /backend/index.html

        log.info("拦截到请求：{}",requestURI);

        //定义不需要处理的请求路径
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/user/sendMsg",
                "/user/login",
                //放行相关津泰资源
                "/doc.html",
                "/webjars/",
                "/swagger-resources",
                "/v2/api-docs"
        };

        //2、判断本次请求是否需要处理
        boolean check = check(urls, requestURI);

        //3、如果不需要处理，则直接放行
        if(check){
            log.info("本次请求{}不需要处理",requestURI);
            filterChain.doFilter(request,response);
            return;
        }

        //4、判断登录状态，如果已登录，则直接放行
        if(request.getSession().getAttribute("employee") != null){
            log.info("用户已登录，用户id为：{}",request.getSession().getAttribute("employee"));
            log.info("当前线程的id:{}",Thread.currentThread().getId());
            //当前用户的id存储到
            ApplicationContext.setData(request.getSession().getAttribute("employee"));
            filterChain.doFilter(request,response);
            return;
        }
        if(request.getSession().getAttribute("user") != null){
            log.info("用户已登录，用户id为：{}",request.getSession().getAttribute("employee"));
            log.info("当前线程的id:{}",Thread.currentThread().getId());
            //当前用户的id存储到
            ApplicationContext.setData(request.getSession().getAttribute("user"));
            filterChain.doFilter(request,response);
            return;
        }


        log.info("用户未登录");
        //5、如果未登录则返回未登录结果，通过输出流方式向客户端页面响应数据
//        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        filterChain.doFilter(request,response);
        return;

    }

    /**
     * 路径匹配，检查本次请求是否需要放行
     * @param urls
     * @param requestURI
     * @return
     */
    public boolean check(String[] urls,String requestURI){
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestURI);
            if(match){
                return true;
            }
        }
        return false;
    }
}

//    @Override
//    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
//            throws IOException, ServletException {
//        log.info("登录过滤器");
//        HttpServletResponse response = (HttpServletResponse) servletResponse;
//        HttpServletRequest request = (HttpServletRequest)servletRequest;
////        1:放行应该直接放行的资源访问
//        String[] pathes = {
//                "/employee/login",
//        "/employee/logout",
//        "/backend/**",
//        "/front/**"};
//        //获取路径
//        String requestURL = request.getRequestURL().toString();
//        log.info("当前访问的路径: {}",requestURL);
//                //2、判断本次请求是否需要处理
//        boolean check = check(pathes, requestURL);
//
//        //3、如果不需要处理，则直接放行
//        if(check){
//            filterChain.doFilter(request,response);
//            return;
//        }
//
//        HttpSession session = request.getSession();
//        Object emp = session.getAttribute("emp");
//        if (emp!=null){
//            log.info("已登录，id为: {}",request.getSession().getAttribute("emp"));
//            filterChain.doFilter(servletRequest,servletResponse);
//            return;
//        }
//        //3：阻止用户访问资源目标，跳转登录页面
//        log.info("未登录，跳转至登录界面");
//
//String notlogin = JSON.toJSONString(R.error("NOTLOGIN"));
//response.getWriter().write(notlogin);
//return;
//        }
//        //2:判断用户是否登录： employee/delete
//
//    public boolean check(String[] urls,String requestURI){
//        for (String url : urls) {
//            boolean match = PATH_MATCHER.match(url, requestURI);
//            if(match){
//                return true;
//            }
//        }
//        return false;
//    }




